so I've checked the fan, it's as clean as can be, rotates fine.When the unit is powered on, i an can certainly feel air being pushed out the back, however the log files are still spamming "fan can't rotate, check it please."

I am curious, have you done a "Restore to factory default settings" yet? It seems this to produces unexpected results, and since it is relatively easy compared to finding and installing a new fan, I thought I would ask if this has been done.

I am curious, have you done a "Restore to factory default settings" yet? It seems this to produces unexpected results, and since it is relatively easy compared to finding and installing a new fan, I thought I would ask if this has been done.

I thought about resetting to factory defaults, but my only worry is that if I do that, i'll be unable to access the data on the drives.I know that the drives are formatted especially for the DNS-323, and don't want to end up loosing access to all 4TB of data that's currently on them.

Can I safely reset the DNS-323 to factory defaults without loosing access to the data or having it decide to reformat the drives?

Hi Zxurian,I am not sure if you have done the "Reset to factory defaults" or not, but if you still want to try, it will not effect your data but will likely remove some settings and passwords. You could save the configuation file somewhere and then do the reset and reinstall your save config file though or manually re-enter if you wish. If that doesn't fix your fan issue, it almost certainly is hardware related. If you can't live with it. I would think twice about just trying to find a replacement fan. It might be both hard to find and difficult to replace and not cheap. Then there is the chance that something else, another component on the board is causing the unusual fan behavior. Another option might be to consider checking the auction sites for a used 323, if you get lucky and get a reasonable price on one, it might be cheaper and less aggrivation in the long run. Good luck